ボリス・ジョンソン前ロンドン市長が6月30日、保守党の次期党首選に立候補しないことを明らかにした。BBCが伝えた。 CORRECTS TO HE WILL NOT RUN - Former London mayor Boris Johnson announces that we will not run for leadership for Britain's ruling Conservative Party in London, Thursday, June 30, 2016. The battle to succeed Prime Minister David Cameron as Conservative Party leader has drawn strong contenders with the winner set to become prime minister and